build.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project default="main" name="mutex">
    <property name="src.dir" value="src/" />
    <property name="build.dir" value="build/" />
    <property name="classes.dir" value="classes/" />
    <property name="mainclass" value="app.Main" />
    <property name="javac.path" value="../java/bin/javac" />
    <path id="mutex.classpath">
        <fileset dir="./lib/">
		<include name="*.jar" />
	</fileset>
    </path>
    <target name="clean">
    	<delete dir="${classes.dir}" />
	<delete dir="${build.dir}" />
    </target>
    <target name="compile">
    	<mkdir dir="${classes.dir}" />
	<javac srcdir="${src.dir}" destdir="${classes.dir}" includeantruntime="false"  debug="true">
		<classpath refid="mutex.classpath" />
	</javac>
    </target>
    <target name="build">
    	<mkdir dir="${build.dir}" />
	<jar destfile="${build.dir}/${ant.project.name}.jar" basedir="${classes.dir}">
	    <zipgroupfileset dir="./lib/" includes="*.jar" />	
	    <manifest>
		<attribute name="Main-Class" value="${mainclass}" />
		<attribute name="Class-path" value="." />
	    </manifest>
	</jar>
    </target>
    <target name="main" depends="clean,compile,build" />
</project>